code: def test_histogram_plot_styling(self):
      props = {
          "color": "orange",
          "line_width": 7,
          "line_color": "green",
      }
      hist = Histogram((self.edges, self.frequencies)).opts(**props)
      state = self._get_plot_state(hist)
      marker = state["data"][0]["marker"]
      self.assert_property_values(marker, props)
  
file_path: holoviews/holoviews/tests/plotting/plotly/test_histogram.py
imports: import numpy
  from holoviews.element import Histogram
  from .test_plot import TestPlotlyPlot
label_desc: Use image node_id 4 for calling the TestHistogramPlot obj's underlying member method code with example usage: obj.test_histogram_plot_styling() without return types